//反射
var obj = {
     a: 1,
     set : function(a){
        this.a = a
     }
}
var receiver = {
    a : 2
}

Reflect.set(obj, 'a', 11)
console.log(obj.a)
console.log(receiver.a)

Reflect.set(obj, 'a', 3, receiver)

console.log(obj.a)
console.log( receiver.a)



